EP0165019A2 - Fabric pickup device - Google Patents

Fabric pickup device Download PDF

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Publication number
EP0165019A2
EP0165019A2 EP85304016A EP85304016A EP0165019A2 EP 0165019 A2 EP0165019 A2 EP 0165019A2 EP 85304016 A EP85304016 A EP 85304016A EP 85304016 A EP85304016 A EP 85304016A EP 0165019 A2 EP0165019 A2 EP 0165019A2
Authority
EP
European Patent Office
Prior art keywords
plates
plate
needles
blade
fabric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85304016A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0165019A3 (en
Inventor
Itzchak Porat
Percy Grosberg
Magid Nasser Moghaddassi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Leeds Industrial Services Ltd
Original Assignee
University of Leeds Industrial Services Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Leeds Industrial Services Ltd filed Critical University of Leeds Industrial Services Ltd
Publication of EP0165019A2 publication Critical patent/EP0165019A2/en
Publication of EP0165019A3 publication Critical patent/EP0165019A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/22—Separating articles from piles by needles or the like engaging the articles

Definitions

  • This invention relates to fabric pickup devices.
  • DE-A-2160437 describes a fabric pickup device involving two plates equipped with needles on their lower surfaces, the tips of the needles being bent so that those on one plate face away from those on the other plate.
  • the plates can be moved vertically into contact with the uppermost one of a stack of fabric layers and the plates can then be moved horizontally away from each other so that the points of the needle tips engage the uppermost fabric layer and that layer is tensioned between the plates.
  • the plates can then be lifted, so lifting the top layer of fabric, which can be removed from the plates by fingers pivoted thereon and located between the needles, movement of the fingers from above to below the needle points effecting the required separation.
  • this arrangement will be unreliable when handling light or flimsy fabrics.
  • the present invention is directed to solving the problem of reliably and repeatedly separating one single layer of fabric from a stack of such layers, irrespective of the type, size or weight of the fabric.
  • Successful mechanisation of this operation is one of the keys for a tomating the garment manufacturing industry, and the invention seeks to provide a device that is more effective than those hitherto proposed.
  • a fabric pickup device comprises a carrier; two pickup plates lying one to each side of the carrier, each pickup plate having a lower surface with an inner edge adjacent to the carrier and an outer edge; means mounting each plate on the carrier adjacent to the inner edge of the respective plate for pivotal movement of the plates in opposite senses about parallel, substantially horizontal axes; a plurality of needles carried on the lower surface of each plate; the tps of all the needles on a plate being substantially parallel, lying at an acute angle to the lower surface of the respective plate and pointing towards the outer edge of the respective plate, and the points of all the needles on a plate being substantially coplanar; a nozzle located on the carrier between the two plates for directing an air blast downwardly between the plates; and means for pivoting the plates between a standby position wherein the tips of the needles on one plate lie at a downwardly acute angle tc the tips of the needles on the other plate and below the level of the nozzle, a pickup position wherein the plates are pivoted upwardly from the standby
  • the device also includes a blade mounted below the level of the needle points, means for moving the blade in a first horizontal direction parallel to the pivotal axes of the plates between a withdrawn position spaced from the region directly below the plates and a separating position lying directly below the plates, and means for moving the blade in a second horizontal direction perpendicular to the first horizontal direction.
  • the device is provided with a mounting plate 1 by way of which it may be secured to a suitable support positioned above a table 2 on which may be stacked a pile of fabric layers.
  • the support and the table may be relatively movable in either or both of the horizontal and vertical directions to ensure that the table can be loaded with fabric and presented to the device, and so that layers lifted from the table by the device can be deposited onto a further supporting surface at either the same or a different location.
  • Such arrangements will be readily apparent to those skilled in the art, and as they are not germane to the device itself they will not be further described.
  • the mounting plate has a block 3 secured thereto, to which is bolted a bracket 4 having a lower member 5 of greater width than the plate 1.
  • An angle bracket 6 extending the full width of the device has a vertical web bolted to the member 5 and a horizontal web to which is bolted a base plate 7 that again extends for the full width of the device.
  • a pickup assembly indicated generally as 8.
  • the assembly has a main body 9 with a compressed air connector 10 on the top thereof and with a downward extension 11. Internal passages within the body and the extension connect the air entry to a nozzle 12 at the lower part of the extension.
  • a guide 13 is secured to the body by bolts 14 and is slidably mounted on a vertical guide rod 15 secured to the angle bracket 6 by screws 16.
  • Clamp bars 17 and 18, together with bolts 19, secure three double acting pneumatic cylinders 20 to 22 to the body 9, each cylinder having associated upper and lower compressed air connections, such as connections 23 and 24 for the cylinder 20 and connections 25 and 26 for the cylinder 22.
  • a piston 27 associated with the cylinder 22 is secured to the base plate by screws 28. Extension or retraction of cylinder and piston combination 22, 27 will thus cause vertical movement of the body relative to the bracket 6 and base plate 7.
  • each pickup plate has a lower surface 31, 32 respectively with an inner edge 33, 34 respectively lying adjacent to the carrier and an outer edge 35, 36 respectively.
  • the plates are mounted on the carrier adjacent their inner edges for pivotal movement about parallel, horizontal axes, 37, 38.
  • the lower surface of each plate carries a plurality of needles 39, 40 respectively, which are conveniently provided in the form of pads of card clothing wire, with a needle density of at least sixteen needles per cm 2 The tips of all the needles on a plate, i.e.
  • those sections of the needles lying outwardly of the bend or elbow thereof, are substantially parallel, lie at an acute angle to the lower surface of the respective plate and point towards the outer edge of the respective plate.
  • the points of all the needles on a plate are substantially coplanar, and they are exposed through an opening 41 in the base plate 7.
  • Pistons 50 and 51 associated with cylinders 20, 21 are secured to a bar 52 from which a plate 53 having a cam slot 54 depends.
  • the plates 29, 30 each have a roller 55, 56 rotatably mounted at the rear thereof and engaging the cam slot 54.
  • extension and retraction of pistons 50, 51 will cause vertical movement of the cam plate 53, so enabling the plates to be pivoted between a standby position, a pickup position and a release position as will be further explained with reference to Figures 6 to 11.
  • An end plate 60 is secured to the angle bracket 6 and base plate 7 at the end thereof adjacent to the pickup assembly 8.
  • a motor 61 driving a chain wheel 62 is mounted on the end plate 60.
  • Also mounted on that plate are ends of two parallel slide bars 63, 64, the other ends of which are secured in a mount 65 fixed to the opposite end of the base plate 7.
  • the mount 65 also carries a support 66 to which is secured a bearing 67 for a further chain wheel 68.
  • a chain 69 extends between the two chain wheels 62 and 68 substantially parallel to the slide bars.
  • a first blade assembly 70 is fixed to the end plate 60 and a second blade assembly 71 is carried by a block 72 which is mounted on the slide bars for movement therealong.
  • the assembly 70 has an arm 73 to which are secured two guide collars 74, 75 and on which is mounted a double acting pneumatic cylinder 76 with upper and lower air line connections 77, 78 respectively.
  • a piston 79 associated with the cylinder is secured to a plate 80, from the upper surface of which project vertical rods 81, 82 engaging the collars 74, 75 respectively and so guiding the plate 80 for vertical movement.
  • a further double acting pneumatic cylinder 81 is secured to the lower surfaces of the plate 80 by a clamp 84, each end of the cylinder having air line connectors 85, 86 respectively.
  • a piston 87 associated with the cylinder is secured to an arm 88 fixed to a slide 89 movable in a slideway 90 secured to part of the clamp 84.
  • the slide carries a blade 91.
  • the arrangement is such that the two blades 91 and 91a lie horizontally and substantially in the same plane.
  • the thickness of blade 91a is greater than that of blade 91 and the edge 92 of the former is formed with a groove in which the edge 93 of the latter may be received, as shown more clearly in Figure 4.
  • the blade assembly 71 is moved from the position shown in Figure 3 to a position wherein the blade 91a is in line with the nozzle 12, and both the blades 91 and 91a are retracted to lie clear of the edge of the base plate 7, the two blades thus having the positions indicated at 94 and 94a respectively in Figure 3. Additionally, the blades are lowered from the positions shown in solid lines in Figure 1 to the positions shown in broken lines therein, lying significantly below the lower surface of the base plate.
  • the device is positioned over a stack of fabric layers positioned on the table 2 so that an edge of the stack lies below a front edge 7a of the base plate 7 and so that another edge of the stack lies below that end of the base plate at which the blade assembly 70 is mounted.
  • the motor 61 is then operated to move the blade assembly 71 to the left so that the blade 91a takes up the position shown in Figure 9, further increasing the space between the top layer and the layer immediately below.
  • the blade 91 is then advanced into this space by retraction of piston 87 in cylinder 83, the edge 93 of blade 91 engaging within the groove 92 in the edge of blade 91a to ensure that fabric is not trapped between the blades.
  • the blade 91a is then moved to the right by operation of the motor to a right hand limit position that has been preset according to the shape of the fabric pieces being handled.
  • the table with any remaining layers of fabric may then be removed and replaced by a different support surface, or the pickup device with the single fabric layer held thereby may be transported to a location above another surface 96 onto which the fabric layer is to be deposited.
  • the blades are lowered and then retracted clear of the base plate 7.
  • the cylinders 20, 21 are operated to pivot the plates 29, 30 downwardly so that the tips of the needles on each plate lie substantially vertically and below the level of the nozzle 12 as shown in Figure 11.
  • Cylinder 22 is then operated so that the body 9, carrying with it the plates 29 and 30 is raised relative to the base plate 7 so that the points of the needles lie above the level of the lower surface of the base plate.
  • the fabric layer is thus positively separated from the needles and deposited on the surface 96.
  • the pickup device can then be raised from that surface and all parts returned to their original positions.
  • the device described is capable accurately of separating single layers from a stack of fabric layers consistently and reliably. However, there may be isolated instances wherein no layer or more than one layer is inadvertently picked up, and it is useful to be able to detect this.
  • One convenient method of detecting the absence of any layer is to form a section of the base plate that lies immediately above the blade 91 with an electrically conductive strip 97 positioned between two insulating sections 98 and 99. With a metal blade 91 it can be arranged for a circuit to be completed when that blade contacts the strip 97 in order to give an indication that no layer lies between these two parts.
  • the device can then be controlled to return to the pile of fabric layers for a second attempt. If the blade 91 is in its withdrawn position while the device is attempting the pickup action then contact between the strip 97 and a metal table could indicate exhaustion of the pile of fabric layers and generate a signal accordingly.
  • a ply detector that may be used to detect the presence of more than one ply on the carrier may comprise means for drawing a vacuum through the layers of fabric that are carried by the pickup device, and for measuring the air permeability of the fabric. Significant differences in air permeability occur between suction through one layer or more than one layer, and this difference may be detected in order to generate an appropriate signal.
  • any mechanical, electrical, or fluid-powered means may be utilised for effecting the relative movement of the various parts, and the invention is not limited to the use of the double acting pneumatic rams described. It is not necessary to use carding wire for the needles, although this is a particularly convenient method. Any type of needle arrangement that will provide needle tips at a suitable angle may be used. An acute angle between the tips and the lower surface of the plate chosen to be from 20° and 80° will generally be suitable.
  • fabric release from the needles is assisted by mounting the plates so that they may be moved bodily relative to the base plate to project through an opening in the base plate to effect pickup or to be moved to above the base plate level on release. However, this is not essential, and at least with some fabrics release may be effected by merely allowing the fabric to fall from the needles when their tips are vertical. If assisted release is required then it may be achieved in ways other than that described.
EP85304016A 1984-06-08 1985-06-06 Fabric pickup device Withdrawn EP0165019A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8414636 1984-06-08
GB848414636A GB8414636D0 (en) 1984-06-08 1984-06-08 Fabric pickup device

Publications (2)

Publication Number Publication Date
EP0165019A2 true EP0165019A2 (en) 1985-12-18
EP0165019A3 EP0165019A3 (en) 1986-01-08

Family

ID=10562116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85304016A Withdrawn EP0165019A3 (en) 1984-06-08 1985-06-06 Fabric pickup device

Country Status (5)

Country Link
US (1) US4679784A (zh)
EP (1) EP0165019A3 (zh)
JP (1) JPS6160538A (zh)
GB (1) GB8414636D0 (zh)
IL (1) IL75419A0 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004558A1 (en) * 1988-10-27 1990-05-03 Cimcorp Oy Method and apparatus for the picking up and handling of sheets of material, in particular sheets of porous and flexible material
WO1991014641A1 (de) * 1990-03-21 1991-10-03 Institut Für Textil- Und Verfahrenstechnik Der Deutschen Institut Für Textil- Und Faserforschung Stuttgart Verfahren und vorrichtung zum vereinzeln von gestapelten textilen zuschnitten
US5951001A (en) * 1995-03-01 1999-09-14 A.S.T System Automation Di Stradi A. & C. S.N.C. Device for raising an edge of a topmost sheet of a pile of sheets

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8911949U1 (zh) * 1989-10-06 1991-02-07 Kuka Schweissanlagen + Roboter Gmbh, 8900 Augsburg, De
US5463921A (en) * 1993-03-05 1995-11-07 The Charles Stark Draper Laboratory, Inc. Method and apparatus for automated handling of cut material
DE4345042C1 (de) * 1993-12-31 1995-05-04 Hebel Ag Vorrichtung zum Entfernen der beim Schneiden von plastischen Porenbetonblöcken od. dgl. entstehenden oberen Abfallschicht
US6105622A (en) * 1998-03-02 2000-08-22 Shenkar College Of Textile, Technology And Fashion Method of weft insertion into a planar warp for high density three dimensional weaving
CN110079987A (zh) * 2019-06-05 2019-08-02 南京通孚轻纺有限公司 用于裁切设备后道的裁片拾取装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2160437A1 (de) * 1971-12-06 1973-06-14 Ivanhoe Research Corp Verfahren und vorrichtung zum abheben und trennen des obersten faserigen werkstueckes von einem stapel faseriger werkstuecke
DD104272A1 (zh) * 1973-04-19 1974-03-05
DE3040197A1 (de) * 1979-10-26 1981-05-07 Jean Pierre Ensues la Redonne Hellin Vorrichtung zur entnahme von stoffen o.dgl. von einem stoffstapel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3625506A (en) * 1969-11-28 1971-12-07 Ivanhoe Research Corp Method and apparatus for differentiating the top fibrous workpiece from a stack of fibrous workpieces and for separating the differentiated workpiece from the stack
FR2249008B1 (zh) * 1973-10-26 1978-06-09 Bijttebier Gaspar
IT1149632B (it) * 1982-02-12 1986-12-03 Car Ventomatic Spa Dispositivo di prelievo e separazione dei sacchida pacco per il servizio di infilasacchi automatici
US4505468A (en) * 1983-05-16 1985-03-19 Heisler Raymond A Apparatus for engaging and moving corrugated paperboard portions by reciprocated pins

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2160437A1 (de) * 1971-12-06 1973-06-14 Ivanhoe Research Corp Verfahren und vorrichtung zum abheben und trennen des obersten faserigen werkstueckes von einem stapel faseriger werkstuecke
DD104272A1 (zh) * 1973-04-19 1974-03-05
DE3040197A1 (de) * 1979-10-26 1981-05-07 Jean Pierre Ensues la Redonne Hellin Vorrichtung zur entnahme von stoffen o.dgl. von einem stoffstapel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990004558A1 (en) * 1988-10-27 1990-05-03 Cimcorp Oy Method and apparatus for the picking up and handling of sheets of material, in particular sheets of porous and flexible material
US5083763A (en) * 1988-10-27 1992-01-28 Cimcorp Oy Method and apparatus for the picking up and handling of sheets of material, in particular sheets of porous and flexible material
WO1991014641A1 (de) * 1990-03-21 1991-10-03 Institut Für Textil- Und Verfahrenstechnik Der Deutschen Institut Für Textil- Und Faserforschung Stuttgart Verfahren und vorrichtung zum vereinzeln von gestapelten textilen zuschnitten
US5951001A (en) * 1995-03-01 1999-09-14 A.S.T System Automation Di Stradi A. & C. S.N.C. Device for raising an edge of a topmost sheet of a pile of sheets

Also Published As

Publication number Publication date
IL75419A0 (en) 1985-10-31
JPS6160538A (ja) 1986-03-28
GB8414636D0 (en) 1984-07-11
EP0165019A3 (en) 1986-01-08
US4679784A (en) 1987-07-14

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: PORAT, ITZCHAK

Inventor name: GROSBERG, PERCY

Inventor name: MOGHADDASSI, MAGID NASSER

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Inventor name: PORAT, ITZCHAK

Inventor name: MOGHADDASSI, MAGID NASSER

Inventor name: GROSBERG, PERCY